Mechanical movement



(No Model.)

J. D. WESTGATE.

MECHANICAL MOVEMENT.

No. 477,191. Patented June 14, 1892.

UNITED STATES PATENT OFFICE.

JOSEPH D. \VESTGATE, OF \VORCESTER, MASSACHUSET' 7 S, ASSIGNOR TOCHARLES H. VOODOOCK, OF SAME PLACE, AND GEORGE ANSON XVALKER, OF BOSTON,MASSACHUSETTS.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 477,191, dated June 14,1892.

Application filed May 13, 1891. Serial No. 392,577. (No model.)

To aid whom it may concern.-

Be it known that I, JOSEPH D. \VESTGATE, a citizen of the United States,residing at \Vorcester, in the county of \Vorcester and State ofMassachusetts, have invented a new and useful Improvement in MechanicalMovements, of which the following is a specification, reference beinghad to the accompanying drawings, in which Figure 1 represents a sideelevation of a mechanism embodying my invention. Fig. 2 is a top view ofthe same. Figs. 3 and 4 represent the operating parts of the mechanismin two diiferent positions.

Similar letters refer to similar parts in the several figures.

The object of my invention is to provide a mechanism by which the rotarymotion of one shaft may be communicated to a second and parallel shaft;and it consists of the several features illustrated in the accompanyingdrawings and hereinafter described.

Referring to the drawing, A A denotes the supporting-posts, mounted uponthe base B, by which the two parallel shafts O and D are supported. Theshaft 0 carries a belt-pulley O, by which rotary motion is imparted tothe shaft, or, if required, a crank can be substituted for thebelt-pulley. The shaft C is provided with a crank C having a crank-pin Cand also with a crank C", having a crankpin C D denotes a shaft parallelwith the shaft 0 and carrying a pinion D, and also having pivotedthereon a bell-crank having arms D and D The arm D is connected by alink D with the crank C, so that the rotation of the shaft C will causean oscillating movement of the arm D The arm D is provided with a stud Dwhich enters a slot E in a lever E, connected at one end with thecrank-pin C and carrying at the opposite end an annular gear Epreferably formed integrally with the lever E and engaging the pinion D.As the shaft 0 is rotateda rocking and a sliding motion will be impartedto the lever E upon the stud D The sliding motion of the lever E uponthe stub D will be equal to twice the radius of the crank-pin C and willtake place durin g the movement of the crank-pin C from one of its(lead-centers to the other,and as the internal diameter of the annulargear less the diameter of the pinion D is equal to twice the radius ofthe crank-pin C the opposite sides of the annular gear E will be made toengage the pinion D as the crank-pin C assumes theposition shown inFigs. 1 and a. At the same time a rocking movement is imparted to thelever E upon the stud D in the movement of the crank-pin 0 past thecenters, the extreme of the rocking movement being reached as the crankpin C reaches the quarter-throw, as shown in one position in Fig. Therotation of the shaftO through the actuating-crank C and link D i111parts an oscillating motion to the bell-crank, by which a compoundmotion is imparted to the annular gear E causing its toothed edge totravel in a circular path and to remain in engagement with the teeth ofthe pinion D, causing the rotation of the shaft 0 to impart a rotarymotion to the pinion D and shaft D.

The mechanical movement forming the subject of my present invention isdesigned to effect the transmission of rotary motion from one shaft toanother, and is especially designed to take the place of thesprocket-wheels and chain belt ordinarily used in bicycles, the shaft 0representing the pedal-shaft, to which power is applied, and the shaft Drepresenting the wheel-shaft. The mechanical movement is, however,adapted to the transmission of rotary motion between shafts placed toofar apart to permit a train of gearing to be used and where a beltconnection is undesirable.

hat- I claim my invention, and desire to secure by Letters Patent, is-

1. The combination of a driving-shaft provided with a crank, a pivotedoscillating lever connected at one end with said crank and carrying aninternal gear upon its opposite end, a driven shaft, a pinion on saiddriven shaft engaged by said internal gear, and a pivoted bell-crankcarrying in one arm a pivot of said oscillating lever and having itsother arm oppinion, an oscillating bell-crank carrying apin upon whichsaid oscillating lever is pivoted, an oscillating lever carrying saidinternal gearand provided With a slot inolosing the pivotal pin carriedby said bell-crank, and a d rivin g-shaft provided With a crankconnected with said oscillating lever and having a sec ond crankconnected by a link with said bellerank, whereby said bell-crank isoscillated,

substantially as described.

3. The combination, with a driving-crank, of an oscillating leverconnected with said crank, an internal gear carried by said oscillatinglever, a driven shaft, a pinion on said driven shaft engaged by saidinternal gear,

an oscillating arm pivoted at one end and carrying a pivotal pin uponwhich said oscillating lever is pivoted, and connected actuatingmechanism, substantially as described, Whereby a movement is imparted tosaid oscillating lever conjointly With the motion imparted to saidoscillating lever by its connected driving-crank, substantially asdescribed.

4. The combination of a driving-shaft 0, provided with cranks C and Cdriven shaft .D, provided with a pinion D, a pivoted bellcrank havingarms D D, said arm D carrying a pin D serving as the fulcrum of anoscillating lever E, provided with a slot E and pivoted upon the pinD'', an internal gear E carried by said oscillating lever and engagingthe pinion D, said oscillating lever being con nected with and actuatedby the crank 0 and a link D connecting the crank O with the arm D of thepivoted bell-crank, whereby an oscillating motion is imparted to thepivotal pin D substantially as described.

Dated at \Vorcester, in the county of W'orcester and State oflllassachusetts, this 5th day of May, 1891.

JOSEPH D. VESTGATE. \Vitnesses:

RUFUS B. FOWLER, CHARLES H. WooneocK.

